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    $\begingroup$ Just to clarify -- is this a real thing found on a real dead carrier pigeon that real cryptographers have spent weeks failing to solve? Or is it a puzzle you've created that has that as a sort of "framing story"? [EDITED to add:] the "weeks" bit refers to text that is no longer in the question. $\endgroup$
    – Gareth McCaughan ♦
    Commented Feb 26, 2019 at 19:06
  • 6
    $\begingroup$ @GarethMcCaughan it sounds like this is a real thing. I have added the "unsolved mysteries" tag. $\endgroup$
    – user46002
    Commented Feb 26, 2019 at 19:13
  • 6
    $\begingroup$ The codes are exactly as the paged linked by @Hugh which quotes GCHQ: "without access to the original code books, details of any additional encryption, or any context around the message, it will be impossible to decode. Similarly it means that any proposed solutions sent to GCHQ will, without such material, be impossible to prove correct." $\endgroup$
    – Weather Vane
    Commented Feb 26, 2019 at 19:32
  • 4
    $\begingroup$ Look guys I am just a question asker . I don’t know much about this question even though I did a lot of research,I couldn’t get any sort of information or trace that could give hints or accuracy, so now be the first to crack it ... Hve a nice day $\endgroup$
    – user56760
    Commented Feb 27, 2019 at 2:11
  • 4
    $\begingroup$ GCHQ says The first group of letters indicated the bird's origin ("NURP" stands for National Union of Racing Pigeons), while the following two-digit number attested its year of registration (40 refers to 1940).The final set of numbers identified the specific pigeon and the area of the country it was from $\endgroup$
    – user56760
    Commented Mar 1, 2019 at 13:47